case "XML":
  text.append("Processing file type XML: "+files[i].getCanonicalPath() + "n" );
  ReadXml read_xml = new ReadXml();
  read_xml.read(files[i].getCanonicalPath(), text);
  break;

public class ReadXml {

    ProgramDocument programDocument = new ProgramDocument();
    public void read(String FILE, javax.swing.JTextArea text ) {

    try {
        JAXBContext context = JAXBContext.newInstance(ProgramDocument.class);
        Unmarshaller u = context.createUnmarshaller();

        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        dbf.setNamespaceAware(true);
        DocumentBuilder db = dbf.newDocumentBuilder();
        Document doc = db.parse(FILE);
        Object o = u.unmarshal( doc );
        doc.getDocumentElement().normalize();
        text.append("Account : " +doc.getElementsByTagName("Account").item(0));

    }
    catch(Exception e) {
        text.append("XML file not parsed correctly.n");
        }
    }
}